The Library halls are beautiful architectural gems. But they can only be enjoyed from the corridors.
The entrance fee is paid only in cash. Additionally, if you want to take photos, you have to pay another fee. The visit is really short, but it is worth it. They are closed for an hour at lunch time, so if you go a little before 1 pm, just before they re-open, then you will be among the first to enter and will be able to better enjoy and appreciate the interior.